﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;

/// <summary>
/// Summary description for ResponseHelper
/// </summary>
public static class ResponseHelper
{
    public static void Redirect(string url, string target, string windowFeatures)
    {
        HttpContext context = HttpContext.Current;

        if ((String.IsNullOrEmpty(target) ||
            target.Equals("_self", StringComparison.OrdinalIgnoreCase)) &&
            String.IsNullOrEmpty(windowFeatures))
        {

            context.Response.Redirect(url);
        }
        else
        {
            Page page = (Page)context.Handler;
            if (page == null)
            {
                throw new InvalidOperationException(
                    "Cannot redirect to new window outside Page context.");
            }
            url = page.ResolveClientUrl(url);

            string script;
            if (!String.IsNullOrEmpty(windowFeatures))
            {
                script = @"window.open(""{0}"", ""{1}"", ""{2}"");";
            }
            else
            {
                script = @"window.open(""{0}"", ""{1}"");";
            }

            script = String.Format(script, url, target, windowFeatures);
            ScriptManager.RegisterStartupScript(page,
                typeof(Page),
                "Redirect",
                script,
                true);
        }
    }
}